Got a basic gemini server running

5 files changed, 153 insertions, 5 deletions

diff --git a/src/cmd/mediocre-blog/main.go b/src/cmd/mediocre-blog/main.go
index 6b41e04..8c6939f 100644
--- a/src/cmd/mediocre-blog/main.go
+++ b/src/cmd/mediocre-blog/main.go
@@ -8,6 +8,7 @@ import (
 	"time"
 
 	cfgpkg "github.com/mediocregopher/blog.mediocregopher.com/srv/cfg"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/gmi"
 	"github.com/mediocregopher/blog.mediocregopher.com/srv/http"
 	"github.com/mediocregopher/blog.mediocregopher.com/srv/mailinglist"
 	"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
@@ -44,6 +45,10 @@ func main() {
 	httpParams.SetupCfg(cfg)
 	ctx = mctx.WithAnnotator(ctx, &httpParams)
 
+	var gmiParams gmi.Params
+	gmiParams.SetupCfg(cfg)
+	ctx = mctx.WithAnnotator(ctx, &gmiParams)
+
 	// initialization
 	err := cfg.Init(ctx)
 
@@ -104,10 +109,10 @@ func main() {
 	httpParams.PostDraftStore = postDraftStore
 	httpParams.MailingList = ml
 
-	logger.Info(ctx, "listening")
+	logger.Info(ctx, "starting http api")
 	httpAPI, err := http.New(httpParams)
 	if err != nil {
-		logger.Fatal(ctx, "initializing http api", err)
+		logger.Fatal(ctx, "starting http api", err)
 	}
 	defer func() {
 		shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
@@ -118,6 +123,23 @@ func main() {
 		}
 	}()
 
+	gmiParams.Logger = logger.WithNamespace("gmi")
+
+	logger.Info(ctx, "starting gmi api")
+	gmiAPI, err := gmi.New(gmiParams)
+	if err != nil {
+		logger.Fatal(ctx, "starting gmi api", err)
+	}
+
+	defer func() {
+		shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
+		defer cancel()
+
+		if err := gmiAPI.Shutdown(shutdownCtx); err != nil {
+			logger.Fatal(ctx, "shutting down gmi api", err)
+		}
+	}()
+
 	// wait
 
 	sigCh := make(chan os.Signal, 1)
diff --git a/src/gmi/gmi.go b/src/gmi/gmi.go
index 358d935..6e2d79f 100644
--- a/src/gmi/gmi.go
+++ b/src/gmi/gmi.go
@@ -1,2 +1,122 @@
-// Package gmi contains utilities for working with gemini and gemtext
+// Package gmi implements the gemini-based api for the mediocre-blog.
 package gmi
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/url"
+	"os"
+	"strings"
+
+	"git.sr.ht/~adnano/go-gemini"
+	"git.sr.ht/~adnano/go-gemini/certificate"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/cfg"
+	"github.com/mediocregopher/mediocre-go-lib/v2/mctx"
+	"github.com/mediocregopher/mediocre-go-lib/v2/mlog"
+)
+
+// Params are used to instantiate a new API instance. All fields are required
+// unless otherwise noted.
+type Params struct {
+	Logger           *mlog.Logger
+	PublicURL        *url.URL
+	ListenAddr       string
+	CertificatesPath string
+}
+
+// SetupCfg implement the cfg.Cfger interface.
+func (p *Params) SetupCfg(cfg *cfg.Cfg) {
+
+	publicURLStr := cfg.String("gemini-public-url", "gemini://localhost:2065", "URL this service is accessible at")
+
+	cfg.StringVar(&p.ListenAddr, "gemini-listen-addr", ":2065", "Address to listen for HTTP requests on")
+
+	cfg.StringVar(&p.CertificatesPath, "gemini-certificates-path", "", "Path to directory where gemini certs should be created/stored")
+
+	cfg.OnInit(func(context.Context) error {
+
+		if p.CertificatesPath == "" {
+			return errors.New("-gemini-certificates-path is required")
+		}
+
+		var err error
+
+		*publicURLStr = strings.TrimSuffix(*publicURLStr, "/")
+
+		if p.PublicURL, err = url.Parse(*publicURLStr); err != nil {
+			return fmt.Errorf("parsing -gemini-public-url: %w", err)
+		}
+
+		return nil
+	})
+}
+
+// Annotate implements mctx.Annotator interface.
+func (p *Params) Annotate(a mctx.Annotations) {
+	a["geminiPublicURL"] = p.PublicURL
+	a["geminiListenAddr"] = p.ListenAddr
+	a["geminiCertificatesPath"] = p.CertificatesPath
+}
+
+// API will listen on the port configured for it, and serve gemini requests for
+// the mediocre-blog.
+type API interface {
+	Shutdown(ctx context.Context) error
+}
+
+type api struct {
+	params Params
+	srv    *gemini.Server
+}
+
+// New initializes and returns a new API instance, including setting up all
+// listening ports.
+func New(params Params) (API, error) {
+
+	if err := os.MkdirAll(params.CertificatesPath, 0700); err != nil {
+		return nil, fmt.Errorf("creating certificate directory %q: %w", params.CertificatesPath, err)
+	}
+
+	certStore := new(certificate.Store)
+	certStore.Load(params.CertificatesPath)
+	certStore.Register(params.PublicURL.Hostname())
+
+	a := &api{
+		params: params,
+	}
+
+	a.srv = &gemini.Server{
+		Addr:           params.ListenAddr,
+		Handler:        a.handler(),
+		GetCertificate: certStore.Get,
+	}
+
+	go func() {
+
+		ctx := mctx.WithAnnotator(context.Background(), &a.params)
+
+		err := a.srv.ListenAndServe(ctx)
+		if err != nil && !errors.Is(err, context.Canceled) {
+			a.params.Logger.Fatal(ctx, "serving gemini server", err)
+		}
+	}()
+
+	return a, nil
+}
+
+func (a *api) Shutdown(ctx context.Context) error {
+	return a.srv.Shutdown(ctx)
+}
+
+func (a *api) handler() gemini.Handler {
+	return gemini.HandlerFunc(func(
+		ctx context.Context,
+		rw gemini.ResponseWriter,
+		r *gemini.Request,
+	) {
+		fmt.Fprintf(rw, "# Test\n\n")
+		fmt.Fprintf(rw, "HELLO WORLD\n\n")
+		fmt.Fprintf(rw, "=> gemini://midnight.pub Hit the pub\n\n")
+	})
+}
diff --git a/src/go.mod b/src/go.mod
index 4b047b9..4f4cf70 100644
--- a/src/go.mod
+++ b/src/go.mod
@@ -3,6 +3,7 @@ module github.com/mediocregopher/blog.mediocregopher.com/srv
 go 1.16
 
 require (
+	git.sr.ht/~adnano/go-gemini v0.2.3 // indirect
 	github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21
 	github.com/emersion/go-smtp v0.15.0
 	github.com/gomarkdown/markdown v0.0.0-20220510115730-2372b9aa33e5
diff --git a/src/go.sum b/src/go.sum
index eb27d7f..c26e7df 100644
--- a/src/go.sum
+++ b/src/go.sum
@@ -1,4 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+git.sr.ht/~adnano/go-gemini v0.2.3 h1:oJ+Y0/mheZ4Vg0ABjtf5dlmvq1yoONStiaQvmWWkofc=
+git.sr.ht/~adnano/go-gemini v0.2.3/go.mod h1:hQ75Y0i5jSFL+FQ7AzWVAYr5LQsaFC7v3ZviNyj46dY=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Masterminds/goutils v1.1.0/go.mod h1:8cTjp+g8YejhMuvIA5y2vz3BpJxksy863GQaJW2MFNU=
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
@@ -193,6 +195,8 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210119194325-5f4716e94777/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 h1:qWPm9rbaAMKs8Bq/9LRpbMqxWRVUAQwMI9fVrssnTfw=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -216,6 +220,7 @@ golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
diff --git a/src/http/http.go b/src/http/http.go
index e5ca3f1..da39374 100644
--- a/src/http/http.go
+++ b/src/http/http.go
@@ -64,7 +64,7 @@ func (p *Params) SetupCfg(cfg *cfg.Cfg) {
 	publicURLStr := cfg.String("http-public-url", "http://localhost:4000", "URL this service is accessible at")
 
 	cfg.StringVar(&p.ListenProto, "http-listen-proto", "tcp", "Protocol to listen for HTTP requests with")
-	cfg.StringVar(&p.ListenAddr, "http-listen-addr", ":4000", "Address/path to listen for HTTP requests on")
+	cfg.StringVar(&p.ListenAddr, "http-listen-addr", ":4000", "Address/unix socket path to listen for HTTP requests on")
 
 	httpAuthUsersStr := cfg.String("http-auth-users", "{}", "JSON object with usernames as values and password hashes (produced by the hash-password binary) as values. Denotes users which are able to edit server-side data")
 
@@ -141,7 +141,7 @@ func New(params Params) (API, error) {
 
 		err := a.srv.Serve(l)
 		if err != nil && !errors.Is(err, http.ErrServerClosed) {
-			ctx := mctx.Annotate(context.Background(), a.params)
+			ctx := mctx.WithAnnotator(context.Background(), &a.params)
 			params.Logger.Fatal(ctx, "serving http server", err)
 		}
 	}()